opencv-压缩图片

使用cvResize函数压缩图片。
//dResizeFactor 缩放比例
//interpolation 插值方式 CV_INTER_NN = 0,CV_INTER_LINEAR = 1,CV_INTER_CUBIC = 2,CV_INTER_AREA = 3,CV_INTER_LANCZOS4 = 4
示例代码如下：

IplImage* m_lpiImage = NULL;IplImage* ImageResize(IplImage* src, double dResizeFactor, int interpolation /*= CV_INTER_LINEAR*/){    //IplImage *imgResize = 0;    if (m_lpiImage)    {        cvReleaseImage(&m_lpiImage);        m_lpiImage = NULL;    }    if (!src)    {        printf("error:image is null\n");        return m_lpiImage;    }    if (dResizeFactor < 1e-7)    {        printf("error:dResizeFactor is < 0\n");        return m_lpiImage;    }    m_lpiImage = cvCreateImage(cvSize(src->width*dResizeFactor, src->height*dResizeFactor), IPL_DEPTH_8U, 3);    printf("resize image\n");    cvResize(src, m_lpiImage, interpolation);    return m_lpiImage;}